is anyone any good at maths? I need a hand please!

Are there any maths experts out there? I'm stuck with a problem, and what with there being 20 years between me going to uni and now, I can't remember how to do it!

any help at all would be most useful!

I basically need to find a function from a table of results, and then calculate a further result. full problem below!

thanks in advance!

Andy

A Ni-Fe-Cr cathode experiments oxidisation at 950 ºC, with an increase in mass (M) for a given area (S) and time (t). The speed of oxidisation is dW/dt = k/W, where W = M/S. Determine:
A) A mathematical expression for the function W^2 = f(t)
B) Extent of the oxidisation after 100 hours

M (mg) S (mm2) t (minutos)
0.21 33 15
0.67 67 50

Re:

42

Re:





:facepalm:

Simply ride in the shade, or just stick to Ti and don't worry.

K is kelvin? I'm trying to remember how, perhaps you'll get the answer on a maths forum? Ni-Fe-Cr welding nickel based alloys such as Inconel by any chance?

So does M =0.21 S 33 and t = 15 ?

I'm not sure what k is... just a constant, I think?

and yes, M=0.21, S=33, t=15
and also M= 0.67, S=67, t=50 for the other given result

the tabs seem to have got lost when posting

thanks!

Re:

k is the constant, that's why you're given two data points to 'plot a graph' and find what it is.

I like turtles

Is this mixte related?

Richard